Heat exchange mechanism



A 30, 1932 F, M, mu 1 ,874,803

HEAT EXCHANGE lgcmmisl Filed Jan. 12. 1951 Patented Au 30, 1932 n mes 1FRANK MAXIQABD REED, or OLEARFIELD, PENNSYLVANIA HEAT EXCHANGEMECHANISM,

Application med January 12, 1931. Serial No. 508,255.

The object of this invention is to utilize the heat of a compressed gasadvantageously: .A particular object of the present invention is toraise the temperature of a body of ,iwater by causing a gas underpressure to.

travel through the same, and a further object of the invention is toprovide a heating mechanism in which a permanent gas will be circulatedand repeatedly compressed so as to i acquire heat and give out its heatfor the purpose of raising the temperature of a room, a body of water,or other matter. One embodiment of the invention is illustrated in theaccompanying drawing and will be hereinl after fully described, thenovel features being particularly pointed out in the appended claims.

In the drawing: Figure 1 is a diagrammatic illustration of l theinvention, and

Figure 2 is an enlarged sectional elevation of a. thermostaticallycontrolled valve arrangement which is employed in the practicalapplication of the invention. Referring more particularly to thedrawing, the numeral 1 indicates a tank which preferably has its wall ofhollow construe-w.

tion filled with some heat-insulating mate-,- rial, as indicated at 2.Near the bottom of F this tank, a cold Water pipe 3 leading from asource of supply is fitted to the same, and from the top thereof a hotwater outlet pipe 4 leads to a point of use. "Across the interior of thetank, near the top thereof, is a horizontal partition or bafiie 5 havinga central opening 6 therethrough' for a purpose which will presentlyappear. Locat'ed i7n'theflovgir pgrtion of the tank is ab'coil ,pre eray o co per i in or'tu in having its ends fitte d thr u gh the opposi isides of the tank. The outlet end of the coil is connected directly to apipe 8 which is equipped with an automatic erpansion valve 10 of anysuitable construction, and in the length of said pipe is a coil 11, thevalve 10 being located between said coil and the tank, as shown. Thecoil 11 may be a refrigerating coil and is indicated as being disposedwithin a clo spre 12 which may be an ordinaryrefrigerating chamber. Fromthe coil 11 a pipe 13 extends to a pump or compressor 14 which isdrivenby an electric motor15, and by the action ofwhich the gas withinthe circulating system is compressed to ahighdegree and, asa result, isheated, The compressor 14 and the motor 15 may be of any approved formand are illustrated in a conventional manner only, the details of theirconstruction being immaterial in the present instance. The compressedgas is driven through a pipe 16, and this pipe is connected with thecoil 7 through a branch pipe 17 equipped with a valve 18 which iscontrolled thermostatically. There is also a by-pass pipe 19 connectedto the pipe .8 between the valve 10 and the tank 1 and connected withthe pipe 16 through'the same fitting that connects the branch 17therewith, the by-pass pipe 19 being equipped with a valve 20 which iscontrolled thermostatically and operates simultaneously with the valve18. In the pipe 19, between the pipe 8 and the valve 20, is formed acoil 21 which is located outside the tank and serves to elongate thepipe 19 whereby the gas travels 1ilng therethroughmay'give'off some ofits eat.

The valves 18'and 20 have their stems fitted through respective valvecasings or pipes,

with their ofiterends slidably mounted in couplingsleeves 2 whichreceive a push rod 23 connected with the respective valve stems b coiledsprings 24, as shown most clearly in ig. 2. The push rod 23 is supportedby the coupling sleeves 22 and by the lower end of a lever 25 whichisfulcrumed at its upper end upon a' bracket 26 which is secured to andprojects from the side of the tank. Within thetank 1 is mounted athermostat, indicated conventionally at 27 having one member ex-,tending through the side of the tank and con: nected with a diaphragm orexpansible member 28 which in turn carries a rod 29 projecting throughand supported by a casing 30 and having its outer end pivoted tothelever 25 between the ends of the latter. The casing 30 is secured uponthe side of the tank in any suitable manner and serves to support andguide the rod 29 and the outer end of the "mowablemember of thethermostat, as well i for any reason rise K as to protect the diaphragmor bellows 28 from damage by chance blows. Normally, the valve 18 isopen and the valve is closed so that the compressed hot gas maycirculate through the pipe 17 and the tank, but if the temperature ofthe water in the tank should above the temperature for which thethermostat .27 is adjusted, the thermostat will be expanded and thelever will be consequently rocked so that the valve 18 will be closedand the valve 20 opened, as illustrated in Fig. 2, whereupon the gaswill circulate through the pipe 19 and the coil 21 around to the pipe 8,instead of flowing through the tank. When the temperature drops again toa point below that for which the thermostat is adjusted, the thermostatwill contract and the leven 25 will be rocked in the opposite directionto open the valve 18 and closethe valve 20, thereby restoring the normalcirculation of the gas. 7

The apparatus is intended to utilize some permanent gas, such as carbondioxide,-sulphur dioxide, or anhydrous ammonia, the gas giving up itsheat in the tank, and then flowing to the coil 11 where it expandsanda'bsorbs heat from the surrounding air and adjacent articles, thenpassing to the compressor where it is subjected to compressionsuflicient to liquefy it and, as it is so compressed, it will be raisedin temperature, as is well known. v

The action of the gas in heating the water maybe comparatively slow, andto expedite the raising of the water to the desired temperature, Iprovide a super-heater above the baffle or partition 5, which, in thepresent instance, is shown as an electrical resistance coil 31 to whichcurrent is supplied over wires 32 in an obvious manner, and in one ofsaid feed wires isinserted a switch 33 of any approved construction,controlled by a thermostat 34 mounted in the tank above the baflie' 5,as shown. The partly heated water within the lower portion of the tankwill rise through the o ening 6 of the battle and as this opening is reatively small, the fiow of water therethrough will be retarded and thesuper-heater 31 will act upon it through a suflicient interval to raiseits temperature to a high degree. 3

The apparatus is obviously simple and compact and ordinarily willrequire no attention after it has once been installed and definitelyadjusted.

Having thus described the invention, I claim:

1. Means for the purpose set forth com prlsing a closed circulatingsystem including a coil, a permanent gas filling the system, acompressor in said system whereby the gas in the system may be caused tocirculate and to be compressed as it passes to the coil, means formaintaining matter to be heated in proximity to the 0011, a by-passconnected to the circulating system at opposite sides of the coil valvesin the by-pass and at one end of the coil, and means controlled by thetemperature of the matter to be heated to simultaneously open one ofsaid valves and close the other valve for establishing the flow throughthe coil or diverting flow through the by-pass.

2. Means for the purpose set forth comprising a circulating pipe, acooling coil in said pipe, means connected with the pipe for effectingcircu ation of a gas therethrough and compressing the gas as it flowsfrom the coil, a second coil adapted to emit heat from the gas, a tanksurrounding the second coil, a by-pass connected with the circulatingpipe atopposite sides of the tank, and thermostatic means actuated bythe temperature of the material in the tank to control the flow of theas through the coil in the tank or through the y-pass I 3. Means for thepurpose set forth comprising a tank, a coil disposed in the lowerportion of the tank, a circulating pipe connected with said coil, meansfor-effecting a to the coil, a bafile in the upper portion of the tankhaving an opening therethrough, and a resistance coil in the tank abovethe battle.

In testimony whereof I aflix my signature.

FRANK MAYNARD REED. [n 5.

the coil and compressing the gas as it flows v

